摘要
为完善柔性光伏支架气动稳定性及阵列气弹干扰效应的研究,通过一倾角可调的柔性光伏支架气弹模型进行风洞试验,研究了不同倾角、不同风向角、不同均匀紊流风场下单柔性光伏支架气动稳定性;在此基础上,通过改变风向角、光伏支架数量和光伏支架之间连接(有、无连接),对10°倾角下光伏支架干扰效应进行研究。结果表明:测试倾角中,10°倾角颤振稳定性最差;测试全风向角中,0°、15°和30°风向角结构颤振稳定性较差;紊流可以抑制光伏支架的颤振,但会增大光伏支架的抖振响应,在10°倾角、0°风向角工况下,紊流度从小于0.5%提高到5.0%、10.0%、15.0%的过程中,结构颤振临界风速分别提高2.92%、6.10%和28.38%,光伏支架的加速度响应(标准差)分别为均匀流场的1.78、4.56倍和6.12倍;阵列时,来流方向第2行受尾流影响最为剧烈,尾流的影响随着距离的增大逐渐减弱,影响区域大致在10~15 m范围内;根据阵列风振响应情况,将阵列划分为尾流区、过渡区和遮挡区;在阵列柔性光伏支架之间布置连接件会减弱阵列尾流区与遮挡区结构振动响应(结构加速度标准差最多减少了56.38%),但对于过渡区结构较为不利(结构加速度标准差增大了24.43%)。
In order to foster a better understanding of the aerodynamic stability of flexible photovoltaic and the aeroelastic interference effect of flexible photovoltaic array,the aerodynamic stability of single flexible photovoltaic in different inclination angles,wind directions and uniform turbulent wind fields was studied by wind tunnel tests with an aeroelastic model that can adjust angles.Furthermore,by changing the wind direction,the number of flexible photovoltaic and the connector conditions between flexible photovoltaics(with or without connection),the interference effect of flexible photovoltaic under 10°was studied.The results show that the flutter stability of 10°inclination angle is the worst;0°,15°and 30°wind direction leads to poorer performance on flutter stability.Turbulence can inhibit flutter but increase the buffeting response of flexible photovoltaic.Under the condition of 10°inclination angle and 0°wind direction,when turbulence increased from less than 0.5%to 5.0%,10.0%and 15.0%,the flutter critical wind speed is increased by 2.92%,6.10%and 28.38%,respectively,and the acceleration buffeting response of flexible photovoltaic is 1.78,4.56 and 6.12 times of uniform flow field.In the case of array,the second row in the direction of incoming flow is most affected by wake,which gradually weakens with the increase of distance,and the affected area is roughly within the range of 10 to 15 m.According to the wind-vibration response of the array,the array is divided into wake zone,transition zone and shielding zone.The installation of connectors between the flexible photovoltaic array will weaken the structural vibration response in the wake zone and the shield zone of the array(the standard deviation of the structure acceleration is reduced by 56.38%at most),but it is unfavorable to the structure in the transition zone(the standard deviation of the structure acceleration is increases by 24.43%).
作者
陈权
牛华伟
李红星
姜东
CHEN Quan;NIU Huawei;LI Hongxing;JIANG Dong(College of Civil Engineering,Hunan University,Changsha 410082,China;Northwest Electric Power Design Institute Co.,Ltd.,of China Power Engineering Consulting Group,Xi'an 710075,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第11期153-161,共9页
Journal of Building Structures
基金
国家自然科学基金面上项目(52178477)。
关键词
柔性光伏支架
风洞试验
气动稳定性
扭转振动
尾流致振
遮挡效应
flexible photovoltaic
wind tunnel test
aerodynamic stability
twisting vibration
wake induced vibration
shadowing
